A silicone seal sink is a type of sink that is sealed with silicone, a type of sealant that provides a waterproof and flexible barrier between the sink and the surrounding countertop or wall. It is used to prevent leaks and damage caused by water penetration. Silicone seal sinks are commonly found in kitchens, bathrooms, and other areas where moisture resistance is essential. They offer advantages such as durability, flexibility, and ease of application compared to traditional sealants.